// Copyright 2019 Google, Inc.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: prod-OptionalExpression
description: >
  optional chain expansions in an async context
info: |
  Left-Hand-Side Expressions
    OptionalExpression
      MemberExpression [PrimaryExpression Identifier] OptionalChain
        OptionalChain ?.[Expression]
features: [optional-chaining]
flags: [async]
---*/

function Test() {
    async function checkAssertions() {
      assert.sameValue(await [11]?.[0], 11);
      assert.sameValue([22, 33]?.[await Promise.resolve(1)], 33);
      assert.sameValue([44, await Promise.resolve(55)]?.[1], 55);
      assert.sameValue(undefined?.[
        await Promise.reject(new Error('unreachable'))
      ], undefined);
    }
    checkAssertions().then($DONE, $DONE);
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
